[antlr-interest] Recursive Grammar
Terence Parr
parrt at jguru.com
Thu Jun 6 15:31:13 PDT 2002
On Thursday, June 6, 2002, at 03:09 PM, johnclarke72 wrote:
> If I have a situation when an item specified in a grammar can be
> repeated within itself how can I describe that using Antlr ? eg A
> HTML Comment within a comment eg
>
> <!-- <!-- A HTML Comment --> -->
>
> I would be grateful for all advice offered.
Comment is a hard one due to the terminating condition needing 3 symbols
of lookahead, but normally you would just do this:
rule : STUFF rule END_STUFF
| OTHER_STUFF
;
recursion ain't no trouble...though in this case you might have trouble
with the "rule" terminating condition.
Ter
--
Co-founder, http://www.jguru.com
Creator, ANTLR Parser Generator: http://www.antlr.org
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